package chixing.day20.class23;
import java.util.List;
public interface ProductService {
    //添加商品
    public boolean add(Product product);
    //修改商品
    public boolean update(Product product);
    //删除商品
    public boolean delete(Product product);
    //查询所有商品
    public List<Product> get();
    //根据Id查询商品
    public Product getById();

    public void fun1();
    public void fun2();

}
